blender will not render any videos
You have turned off file extensions in blender, which includes not only the frame numbering but the vital &quot;.mp4&quot; Filename Extension. The file you rendered is an mp4 file, but it doesn't have a &quot;label&quot; so to speak. I recommend turning on &quot;show filename extensions&quot; in File Explorer to avoid confusion in the future, but to fix the issue at hand:

Turn on &quot;file extensions&quot; in blender for a fix to all future renders.
OR
Type &quot;.mp4&quot; at the end of your filename in blender as a fix to all future renders.

Plus, you can:

Rename the existing rendered file, adding &quot;.mp4&quot; at the end, which will save it. :D

Note: upon the renaming, the added &quot;.mp4&quot; change may be hidden by Explorer without the &quot;show filename extensions&quot; turned on, but it probably did work.